# Patent

## Title
System and method for managing multimedia messaging platforms

## Abstract

A messaging network has a plurality of messaging platforms interconnected through a switched backbone, such as the Internet. A master platform can receive and store status messages destined for a messaging platform that does not have an active connection to the messaging network or is in a non-operational state. In one embodiment, a messaging platform requests information from an information source outside the messaging network. The master platform sends the information request message to the information source and receives a response message therefrom. The response message is sent to the requesting messaging platform. In another embodiment, messages may be transformed into a format specified by the subscriber and delivered thereto.

## Background
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority based on a continuation application Ser. No. 08/944,668, entitled “SYSTEM AND METHOD FOR MANAGING MULTIMEDIA MESSAGING PLATFORMS” by Jack H. Chang and Raymond L. Tong, filed on Oct. 6, 1997. Which is is a continuation-in-part of U.S. patent application Ser. No. 08/853,290 filed May 9, 1997 now U.S. Pat. No. 5,974,449, entitled, “APPARATUS AND METHOD FOR PROVIDING MULTIMEDIA MESSAGING BETWEEN DISPARATE MESSAGING PLATFORMS.” The complete disclosure of the following patent application is hereby incorporated herein by reference as if set forth fully herein.


BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the management of messaging platforms that are interconnected to form a wide-area network.
2. Background
A messaging system as shown in U.S. Pat. No. 5,568,540 to Greco et. al., enables a user to receive messages having a voice mail format either through a telephone or through a personal computer (“PC”) coupled to a local area network (LAN). It also provides a graphical user interface (“GUI”) on the PC to select which voice mail messages to receive and in what order. However, the messaging system in Greco is a stand-alone system and thus, does not provide the advantages of linking to other similar messaging systems or of using interconnected messaging systems to provide distributed messaging.
Accordingly, it would be desirable to integrate messaging platforms distributed on a switchable communications backbone such as the Internet, or equivalent network such as a wide area corporate intranet, and connected to different area networks so as to provide global yet low cost messaging.
Moreover, it would be desirable to monitor each messaging platform and administer the addition, deletion, and updating of a messaging platform in response to a status change to the messaging platform so that each messaging platform is aware of the status change.
In addition, it would be desirable to minimize the complexity that would result if every independent owner of a messaging platform had to contract with every other independent owner of a messaging platform in order to deliver a message within a certain service area served by a messaging platform by imposing a cost tracking scheme on each messaging platform that uses the switched backbone to send a message to another messaging platform for delivery to the service area.
Furthermore, it would be desirable to provide a feature that manages a status message destined for a messaging platform which does not have an active connection to the switched backbone so that the status message is promptly delivered to the messaging platform the next time it re-establishes a connection to the switched network and results in a message confirming delivery of the status message to the messaging platform.
Last, it would be desirable to include an information delivery service that delivers a message from at least one source outside of the messaging network to a subscriber via the subscriber's messaging platform regardless of whether the messaging platform has a dedicated or dial-up connection.
SUMMARY OF THE INVENTION
The present invention manages a messaging network having messaging platforms interconnecting through a switched backbone such as the Internet. Each messaging platform may be independently owned and may also connect to local networks that may be independently owned. A master platform maintains a master global routing table having a messaging platform profile for every messaging platform established on the messaging network. Each messaging platform holds a global routing table which includes a current version of the master global routing table. The master platform monitors each messaging platform on the messaging network and administers the addition, deletion, and updating of messaging platforms by modifying its master global routing table in the event the master platform encounters changes to the status of the messaging platforms. In the event that the master global routing table is updated, the global routing table held by each messaging platform is also updated, ensuring version consistency between the master global routing table and each of the global routing tables. This enables the master platform and each messaging platform to determine the operational status of another messaging platform.
Also, since the messaging platforms may be independently owned and are designed to receive and deliver messages through a variety of networks that may impose surcharges, the present invention also provides a cost tracking feature when delivering messages between messaging platforms that are owned by different entities. This avoids the need for use agreements between messaging platform owners and owners of networks which are connected to the messaging platforms. The cost for each network message delivery is measured in tokens. Each messaging platform on the messaging network has a token pool. Each owner of a messaging platform is charged for the cost of the tokens. Each time a network message delivery is initiated, the originating messaging platform debits a selected number of tokens from its token pool, while each time an inbound network message delivery occurs, a selected number of tokens are credited to the token pool held by a target messaging platform.
The present invention also includes a post office function that enables a master platform to receive and store a status message destined for a messaging platform which does not have an active connection to the messaging network or is in a non-operational state. The present invention also includes an information delivery service that delivers a message from at least one source outside of the messaging network to a subscriber via the subscriber's messaging platform regardless of whether the messaging platform has a dedicated or dial-up connection.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic block diagram of a messaging management system in a presently preferred embodiment of the present invention.
FIG. 2A is a block diagram of a global routing table in accordance with a preferred embodiment of the present invention.
FIG. 2B is a block diagram of a local area routing table in accordance with a preferred embodiment of the present invention.
FIG. 3 is a block diagram showing the addition of a messaging platform to the messaging network in accordance with a preferred embodiment of the present invention.
FIG. 4 is a flow chart of the steps taken by a master platform when monitoring messaging platforms on the messaging network in accordance with a preferred embodiment of the present invention.
FIG. 5 is a flow chart of the steps taken by a messaging platform as part of the monitoring of the network by a master platform in accordance with a preferred embodiment of the present invention.
FIG. 6A is a block diagram showing the deactivation of a messaging platform in accordance with a preferred embodiment of the present invention.
FIG. 6B is a block diagram showing the activation of a messaging platform in accordance with a preferred embodiment of the present invention.
FIG. 6C is a block diagram showing the deletion of a messaging platform in accordance with a preferred embodiment of the present invention.
FIG. 7 is a schematic block diagram of a messaging management system having a post office feature in accordance with a preferred embodiment of the present invention.
FIG. 8 is a block diagram showing the delivery of information from an information source to a mailbox corresponding to a subscriber in accordance with a preferred embodiment of the present invention.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the following description, a preferred embodiment of the invention is described with regard to preferred process steps and data structures. Those skilled in the art would recognize after perusal of this application that embodiments of the invention can be implemented using circuitry in a microprocessor adapted to the particular process steps and data structures, and that implementation of the process steps and data structures described herein would not require undue experimentation or further invention.
The present invention may be used with co-pending U.S. patent application Ser. No. 08/853,290 filed May 9, 1997, entitled, “APPARATUS AND METHOD FOR PROVIDING MULTIMEDIA MESSAGING BETWEEN DISPARATE MESSAGING PLATFORMS,” hereinafter referred to as the (“multimedia messaging invention”). The complete disclosure of the foregoing patent application is hereby incorporated herein by reference as if set forth fully herein.
To further enhance the description of the various features of the present invention, “Service Communication Platform,” Release 2.0, available from Carmel Connection, Inc. located at 41432 Christy Street, Fremont, Calif., 94538 is also incorporated herein by reference as if set forth fully herein.
FIG. 1 is a schematic block diagram of a messaging management system in a presently preferred embodiment of the present invention.
As seen in FIG. 1, a messaging network 10 enables a user 12 to send or receive a message to or from another user 14 using the multimedia services provided by a messaging platform 16 connected to messaging network 10. Messaging network 10 uses a switched backbone 18 such as the Internet, enabling messaging platform 16 to send or receive multimedia messages with another messaging platform on messaging network 10 such as remote messaging platform 20. This provides global messaging at very low cost.
Besides the switched backbone 18, each messaging platform may also individually connect to local networks such as a public switch telephone network 22, 24, 26 (PSTN) which may be connected to messaging devices such as telephones 28, 30, 32 and/or fax machines 34, 36, 38; a private branch exchange 40, 42, 44 (PBX) which may also connect to a messaging device such as a telephone 46, 48, 50; or a privately administered LAN and/or WAN 52, 54, 56 which may connect to messaging devices that include a computer terminal 58, 60, 62 or personal computer 64, 66, 68 running a browser program. These networks may be owned and operated by an owner who may or may not be affiliated with an owner of a messaging platform.
The present invention manages messaging network 10 by monitoring the current availability of each existing messaging platform and administering the addition, deletion, and updating of messaging platforms on messaging network 10. The master platforms and messaging platforms described herewith contain a programmable control means such as a microprocessor system running under program control or an equivalent device to perform these functions.
Also, since the messaging platforms may be independently owned and are designed to receive and deliver messages through a variety of networks that may impose surcharges, the present invention provides a cost tracking scheme when delivering messages between messaging platforms that are owned by different entities. This avoids the need for complex use agreements between messaging platform owners and owners of networks which are connected to the messaging platforms.
In accordance with a presently preferred embodiment of the present invention, the messaging platforms on messaging network 10 are managed by at least one master platform 70. Every master platform on the messaging network 10 contain a master global routing table and every messaging platform on the messaging network contains a global routing table. Master platform 70 maintains a master global routing table 72 for an assigned group of messaging platforms, such as messaging platforms 16 and 20, by editing a messaging platform entry within master global routing table 72 that corresponds to a messaging platform having a status change. Master platform 70 maintains content consistency, through a microprocessor system running under program control or an equivalent device, between master global routing table 72 and global routing tables 74 and 76 so that master platform 70 and messaging platforms 16 and 20 each rely on the same messaging platform entries within the global routing tables.
In response to an applicable event such as the status change discussed above, master platform 70 sends an UPDATE message to messaging platforms 16 and 20, enabling messaging platforms 16 and 20 to update their global routing tables 74 and 76 through a microprocessor system running under program control or an equivalent device. As presently contemplated, the UPDATE message includes at least one messaging platform entry that was modified by master platform 70. The messaging platform entry is used by messaging platforms 16 and 20 to update a corresponding entry in their global routing tables 74 and 76, respectively.
FIG. 2A is a block diagram of a global routing table in accordance with a preferred embodiment of the present invention.
A global routing table 80 as used in the present invention contains a corresponding messaging platform entry 82 for each messaging platform on messaging network 10. Each messaging platform entry includes fields that may point to or include the following: a host ID 84; an operational status 85; an operation schedule 86; a permanent Internet Protocol (IP) address 87 (if applicable); an area of operation 88, and a token pool 89.
Host ID 84 is a unique identifier for every messaging platform added to the messaging network. Host ID 84 may further include additional identifiers such as a domain name 90; a name recording file 92; and/or a network address or equivalent 94.
Operational status 85 defines the operational state of a messaging platform as determined by the master platform assigned to the messaging platform. It is presently contemplated that operational status 85 has either an in-operation (ACTIVATED) or a non-operational (DEACTIVATED) state. Changing the state of operation status 85 is further discussed below.
Operation schedule 86 defines the operation window for a messaging platform. Operation schedule 86 includes a daily operation period 96 and an hourly operation period 98. Daily operation period 96 has a format that includes a start time and an end time in units of hours that are separated by a dash. For example, a daily operation period that starts from 8 AM and ends at 6 PM would be indicated as “08–18.” Similarly, a round-the-clock operation would be indicated as “00–23.”
Hourly operation period 98 defines the hourly operation window for a messaging platform. Hourly operation period 98 has a format that includes a start time and an end time in units of minutes that are separated by a dash. For example, an hourly operation period 98 that starts every fifteen minutes beyond the hour and ends at every half-hour would be indicated as “15–30,” while full hourly operation would be indicated as “00–59.”
Domain name 90 defines a unique network name for messaging platform that corresponds to the messaging platform entry. For a messaging platform that uses the Internet as its switched backbone, domain name 90 corresponds to a TCP/IP network address and complies with the convention for naming a host node, such as a messaging platform, on the Internet.
In the event that the messaging platform entry corresponds to a messaging platform having a dedicated connection to the switched backbone, permanent IP address field 87 contains a permanent IP address or similar network address.
Area of operation 88 may be defined using a local network routing table 100, which is a variable length table but could have any format that is suitable for storing a variable amount of information. The type of information held by local network routing table 100 is dependent on the type of local network connection that a particular messaging platform is capable of supporting besides a messaging network connection. When a messaging platform is configured to also support a telephone network, a local network routing table that corresponds to that messaging platform through its messaging platform entry would include a list of telephone number prefix digits. The telephone numbers listed in local network routing table 100 enable an originating messaging platform to determine which messaging platform can provide service to those telephone numbers by cross-referencing a destination telephone number with the messaging platform entries in the originating platform's global routing table.
Token pool 89 has an initial value that may vary according to the amount sought by an owner of each new messaging platform added. The use of token pool 89 in the present invention will be further described below.
FIG. 2B shows a local network routing table 101 having prefix digits 102 which correspond to a list of telephone numbers. As presently contemplated, prefix digits 102 may include a country code 103 and area code 104, or may further include an office digit code 106 to further define the range of numbers that can be called.
Local network routing table 101 enables an originating messaging platform to determine which remote messaging platform is capable of delivering a user message at an area of operation. The originating messaging platform cross-references the user message address, which may be in the form of a telephone number, with every local network routing table contained in the messaging platform's global routing table.
For example, a fax originating from an originating messaging platform in Hong Kong may have a fax destination number having a country code of “1” and an area code of “510”. The originating platform cross-references the fax number with its local network routing table to determine which remote messaging platform on the messaging network can service that country and area code. More specifically, originating messaging platform can then determine which messaging platform entry to use in order to obtain delivery information such as the domain name of the remote messaging platform and its hours of operation.
Returning to FIG. 2A, name recording file 92 contains a voice recording of the name of a messaging platform. Name recording file 92 may be in any suitable digitized file format such as a .WAV file or similar digitized audio file format.
Network address field 94 holds a permanent IP address, or an equivalent type of network address that is applicable to the type of switched backbone used, of a messaging platform if the messaging platform has a permanent connection to the messaging network. Otherwise, network address field contains an indication that the messaging platform corresponding to the messaging platform entry is configured for dial-up connection to the messaging network.
Adding Messaging Platforms
FIG. 3 is a process chart showing the addition of a messaging platform to the messaging network in accordance with a preferred embodiment of the present invention.
Referring to FIGS. 1–3, at step 120a the addition of a new messaging platform 122 on messaging network 10 begins by requesting an add operation from a system administrator 124 of master platform 70. At step 120b, the add operation includes a registration process that requires system administrator 124 to receive registration information 126 pertaining to new messaging platform 122. Registration information 126 includes a preferred name 128, a permanent IP address 130 or an indication 132 whether new messaging platform 122 will have a dynamically assigned IP address, a domain name 134 (if any), and an initial token amount 136 to fill token pool 89.
Initial token amount 136 may vary among new messaging platforms added to messaging network 10 according to the amount sought by the owner of each new messaging platform. Initial token amount 136 held by a messaging platform at any given time may be replenished through a master platform upon request, as will be described in detail below.
As additional sub-steps to step 120b, a local network routing table 138 and/or an operation schedule 140 may also be provided to system administrator 124.
At step 120c, system administrator 124 creates a new messaging platform entry 142 corresponding to new messaging platform 122 in master global routing table 72. New messaging platform entry 142 includes registration information 126 and a unique node ID 144.
As an additional sub-step in step 120c, a name recording file 146 may also be created by system administrator 124 and included with new messaging platform entry 142 in master global routing table 72, if the new messaging platform is intended for connection to a telephone network such as telephone network 26.
At step 120d, once new message platform entry 142 has been created on master global routing table 72, a system administrator 148 for new messaging platform 122 is provided configuration information 150 which includes assigned node ID 144 and an IP address 152 of master platform 70. Configuration information 150 may also include a password 154 that master platform 70 will recognize as unique to new messaging platform 122.
At step 120e, system administrator 148 configures new messaging platform 122 to have configuration information 150.
At step 120f, in response to entering configuration information 150, new messaging platform 122 establishes a connection with master platform 70 using master platform IP address 152, enabling master platform 70 to respond by providing new messaging platform 122 with applicable information.
More specifically at step 120g, new messaging platform 122 sends an installation request 156 which includes node ID 144, and a password 154 if implemented, to master platform 70. Master platform 70 will recognize node ID 144 as pertaining to new messaging platform 122 based on corresponding messaging platform entry 142 in master global routing table 72 and performs step 120h. 
At step 120h, master platform 70 downloads a copy of master global routing table 72 to new messaging platform 122.
At step 120i, global routing tables 74 and 76 for messaging platforms 16 and 20 on messaging network 10 are updated by master platform 70 to include a messaging entry corresponding to new messaging platform 122. Master platform 70 sends an UPDATE message to messaging platforms 16 and 20 which trigger messaging platforms 16 and 20 to include the new messaging platform entry in their global routing tables 74 and 76, respectively.
Monitoring Messaging Platforms
FIG. 4 is a flow chart of the steps taken by a master platform when monitoring messaging platforms on the messaging network in accordance with a preferred embodiment of the present invention.
Through a microprocessor system running under program control or an equivalent device, a master platform monitors its assigned messaging platforms and updates its master global routing table in response to the monitoring function.
At step 160a, a messaging platform sends a HELLO message to its assigned master platform at selected intervals over a given time schedule. For a messaging platform having a dedicated connection, the selected intervals may be at any selected interval such as every half-hour on the half-hour, 24 hours each day. This selected interval of 30 minutes may be varied and is not intended to limit the present invention in anyway. For a messaging platform having a dial-up connection to the switched backbone, the messaging platform only sends HELLO messages while having a messaging network connection and during the operation schedule defined by the messaging platform's daily and hourly operation periods.
As presently contemplated, a HELLO message includes a command type, node ID, and password (if applicable) that corresponds to the sending messaging platform. The HELLO message may also include additional information pertaining to the messaging platform such as its current token pool balance.
At step 160b, if the HELLO message from the messaging platform is not received by its assigned master platform within an amount of time of the scheduled time (selected wait time) to receive the HELLO message, step 160c is performed.
At step 160c, the master platform will send a QUERY message to the late messaging platform. It is presently contemplated that the selected wait time be no more than ten (10) minutes beyond the scheduled time to receive a HELLO message.
A QUERY message includes a command type, a node ID, and password (if applicable) that corresponds to the sending messaging platform.
At step 160d, if the late messaging platform does not respond within the selected wait time, step 160e is performed. At step 160e, the master platform changes the status of the non-responding messaging platform to a non-operational status and alerts the master platform system administrator of the non-operational status of the non-responding messaging platform. In addition, the master platform returns to step 160c and sends another QUERY message to the late messaging platform with a selected wait time.
If at step 160b, the assigned master platform receives a HELLO message from the messaging platform within the selected wait time, step 100f is performed. At step 100f, the assigned master platform replies with an acknowledge message (ACK).
FIG. 5 is a flow chart of the steps taken by a messaging platform as part of the monitoring of the network by a master platform in accordance with a preferred embodiment of the present invention.
At step 162a, if the HELLO message, which was sent by the messaging platform, is not responded to with an ACK message by the messaging platform's assigned master platform within a selected wait time, step 162b is performed.
At step 162b, the messaging platform sends another HELLO message. It is presently contemplated that the particular messaging platform has a selected wait time of 10 minutes before sending another HELLO message. The amount of wait time is not considered to be limiting in anyway but may be varied to response to the processing loads incurred by a given master and messaging platform so as to optimize system performance.
At step 162c, if the assigned master platform does not respond to the second HELLO message, step 162d is performed. At step 162d, the messaging platform may keep sending a HELLO message each time the wait time expires by returning to set 162b. The messaging platform in step 162d may also send an alert message to the particular messaging platform's system administrator.
Returning to step 162a, if the HELLO message is responded to with an ACK by the master platform within a selected wait time, step 162e is performed. At step 162e, the messaging platform sends another HELLO message to the master platform according to a schedule defined for the messaging platform.
Similarly in step 162c, if the assigned master platform does respond to the second HELLO message within a selected wait time, step 160e is performed so that the messaging platform sends another HELLO message according to a schedule defined for the messaging platform.
Activating/Deactivating a Messaging Platform
FIG. 6A is a block diagram showing the deactivation of a messaging platform in accordance with a preferred embodiment of the present invention.
Referring to FIGS. 1 and 6A, in the event that a messaging platform such as messaging platform 16 has a non-operational status for any significant amount of time, such as one hour, master platform administrator 124 can choose to deactivate messaging platform 16 from messaging network 10.
Deactivation includes the following steps. At step 164a, master platform 70, which may be under software program control or equivalent means, is directed by master platform administrator 124 to update the entry corresponding to messaging platform 16 in master global routing table 72 to reflect a DEACTIVATED operational status.
At step 164b, master platform 70 sends an UPDATE message to each of its assigned messaging platforms on messaging network 10. The UPDATE message includes the entry corresponding to messaging platform 16 that reflects an DEACTIVATED operational status in master global routing table 72.
In an alternative embodiment of the present invention, through a microprocessor system running under program control or an equivalent device, master platform 70 may be configured to update automatically the entry corresponding to messaging platform 16 in master global routing table 72 to reflect a DEACTIVATED operational status when messaging platform does not respond as described above. This helps minimize the need for any intervening action by master platform administrator 124, if desired.
At step 164c, upon receiving the UPDATE message, each messaging platform updates their global routing tables at the entry corresponding to messaging platform 16 to reflect a DEACTIVATED operational status.
FIG. 6B is a block diagram showing the activation of a messaging platform in accordance with a preferred embodiment of the present invention.
Activating a messaging platform is similar to the steps outlined immediately above. At step 166a, master platform 70 updates the entry corresponding to messaging platform 16 in master global routing table 72 to reflect an in-operation status, as shown in FIG. 6B.
At step 166b, master platform 70 also sends an UPDATE message to each of its assigned messaging platforms on messaging network 10. The UPDATE message includes the entry corresponding to messaging platform 16 that reflects an in-operation status in master global routing table 72.
At step 166c, upon receiving the UPDATE message, each messaging platform updates their global routing tables at the entry corresponding to messaging platform 16 to reflect an in-operation status.
Deleting a Messaging Platform
FIG. 6C is a block diagram showing the deletion of a messaging platform in accordance with a preferred embodiment of the present invention.
As shown in FIGS. 1 and 6C, deleting a messaging platform such as messaging platform 16 includes the following steps.
At step 168a, master platform 70 deletes the entry corresponding to messaging platform 16 from master global routing table 72.
At step 168b, the master platform updates the global routing tables of all messaging platforms that are to remain on the network (and which are assigned to the master platform) by sending a DELETE message to each of its assigned messaging platforms on messaging network 10.
As presently contemplated, a DELETE message includes at least one messaging platform entry that was deleted from master global routing table 72 by master platform 70. The messaging platform entry is used by messaging platforms to determine which entry in their global routing tables to delete.
At step 168c, each messaging platform updates their global routing tables by deleting the entry corresponding to messaging platform 16 using the messaging platform entry received from the DELETE message.
Tokens
Referring to FIG. 1, every network message delivery which includes using: 1) a switched network which forms the backbone for messaging network 10 such as switched backbone 18; 2) a network which imposes an outside use fee such as telephone network 22; and 3) a destination messaging platform such as messaging platform 16 used to complete the messaging transaction, will have a delivery cost. For example, an owner of destination messaging platform in San Francisco, Calif., may incur a telephone transmission charge for transmitting a fax originating from a messaging platform in Hong Kong, China to a recipient in San Jose, Calif. In order to minimize the complexity that would result if every independent owner of a messaging platform had to contract with every other independent owner of a messaging platform in order to deliver a message within a certain service area, the present invention imposes a cost for each network message delivery.
The cost for each network message delivery is measured in tokens. As described above, each messaging platform added to messaging network 10 begins with a token pool having an initial amount of tokens. Each owner of a messaging platform is charged for the cost of the tokens. Each time a network message delivery is initiated, the originating messaging platform debits a selected number of tokens from its token pool, while each time an inbound network message delivery occurs, a selected number of tokens are credited to the token pool held by a target messaging platform. Each messaging platform performs the debiting and crediting functions under software control or equivalent means.
Replenishing Tokens
If the entire token pool held by a messaging platform falls below a selected threshold amount such as when the token pool may soon be depleted or is depleted, the pool is replenished centrally by using its assigned master platform to provide additional tokens. Depletion of the entire pool of tokens for a given messaging platform ceases all network message deliveries by that messaging platform until its token pool is replenished. A microprocessor running under program control or equivalent device in the messaging platform determines whether it may request delivery of a user message via the messaging network. The token pool may be replenished by purchasing additional tokens through a request for replenishment to its assigned master platform or by gaining tokens from future inbound network message deliveries.
Upon a request for replenishment, the master platform sends an INFO message to the corresponding messaging platform which updates the token pool of that messaging platform. It is presently contemplated that an owner of a new messaging platform purchases an initial token pool amount at the time the new messaging platform is added to the network. Additional tokens may then be purchased for replenishing any depleted amounts.
As presently contemplated, an INFO message includes a command type and the node ID and password (if applicable) of the sending messaging platform. For example, the INFO message command type may include a token update command and a value for specifying a replenishment amount. The receiving messaging platform interprets an INFO message having a command type of token update by updating its token pool by the value specified in the command type.
Master Platform Post Office Feature
The present invention may also include a post office function for handling a message that is intended for a message platform that is in a non-operational state (target messaging platform) such as a messaging platform having a dial-up connection that is not within its operation schedule. The message is routed to a master platform which stores the message. The master platform delivers the message to the target messaging platform when the master platform determines that the target messaging platform has an in-operation status.
For example, referring to FIG. 7, a messaging platform such as messaging platform 170 may have a dial-up connection 172 to messaging network 174 via its switched backbone such as the Internet 176. Since dial-up connection 172 may not be continuous, messages sent between messaging platform 170 and Internet 176 may be delayed. For example, messaging platform 178 may send a delivery-confirmed status message 180 to messaging platform 170 to confirm delivery of a user message 182 sent from messaging platform 170. If messaging platform 170 has a disconnected dial-up connection 172, delivery-confirmed confirming status message 180 will not arrive until dial-up connection 172 is re-established, which would be attempted during the operational period defined for messaging platform 170. Also, messaging platform 178 will not receive a confirming message from messaging platform 170 that delivery-confirmed status message 180 has been received until dial-up connection 172 has been established. Consequently, a status message intended for a messaging platform having a non-operational status at the time of delivery is instead routed to master platform 184 by the messaging platform that was requested to deliver a user message to a local area such as messaging platform 178.
Messaging platform 178 determines whether messaging platform 170 can receive the delivery-confirmed status message 180 by referring to global routing table 192. If the messaging platform entry in global routing table 192 indicates the inability of messaging platform 170 to receive delivery-confirmed status message 180, messaging platform 178 routes delivery-confirmed status message 180 to master platform 184. The inability to receive status messages may be indicated, for example, by an operation schedule that shows a messaging platform is not within its operation window such as its daily and/or hourly operation period.
When master platform 184 receives confirming message 180 from messaging platform 178, it stores confirming message 180 in a memory store location 186 corresponding to messaging platform 170 (mailbox slot) and tags confirming message 180 for delivery the next time messaging platform 170 is scheduled to re-connect. Master platform 184 determines the appropriate time to deliver the reply message by referencing messaging platform entry 188 corresponding to messaging platform 170 in master global routing table 190.
Unlike a messaging platform having a dial-up connection or a connection that has been interrupted, a messaging platform having a dedicated connection receives status messages directly from the replying messaging platform such as messaging platform 178 in FIG. 7. Replying messaging platform 178 distinguishes between messaging platforms having a dedicated or dial-up connections by referencing global routing table 192.
As an alternative embodiment, a status message 194 may be sent directly by messaging platform 178 to the messaging platform 170 as an email. However, if dial-up connection 172 has not yet been re-established, status message 194 will not be delivered to messaging platform 170 but will be held by the service provider 196 until dial-up connection 172 is re-established. Unlike in the first embodiment, this approach does not specifically provide for a confirmation of receipt by messaging platform 170 since service provider 196 may not provide a confirmation of receipt of status message 194 by messaging platform 170 once dial-up connection 172 has been re-established.
Information Delivery
Referring to FIGS. 7 and 8, the above described post office feature may be enhanced to include delivering information 198 from at least one information source 200 outside of messaging network 174 to a mailbox 202 provided by messaging platform 204. Messaging platform 204 has been configured to provide mailbox 202 which corresponds to a subscriber 205.
At step 206a, subscriber 205 logs on to messaging platform 204 to subscribe to an information delivery service provided by the messaging network. Logging on to messaging platform 204 may be accomplished through a telephone 206 since messaging platform 204 is configured to provide a telephone interface capable of interpreting subscriber-entered information made through a DTMF generator such as through a telephone keypad. To ensure proper information delivery, subscriber 205 is prompted for a mail box ID and/or password for identification purposes.
At step 206b, subscriber 205 provides service information 208 by selecting an information type 209, a delivery period 210 that defines how often information type 208 is to be delivered, and a delivery format 211. Service information 208 is provided through a service menu that is presented to subscriber 205 by messaging platform 204. The service menu provides a list of available services that messaging platform 204 has been configured to provide to its supported users. One of the services listed may include the information delivery service discussed herein. The service menu may also include additional services that are discussed in the present invention as well as services discussed in the multimedia messaging invention, which is incorporated herein by reference. Once the information delivery service is chosen, subscriber 205 is presented with a sub-menu that lists the information types that the messaging network has been configured to provide under that service.
For example, the sub-menu lists information types such as stocks, sports, and weather that may be selected by subscriber 205 through a telephone keypad (or equivalent DTMF generator). The button depressed reflects the position of the information type selected in the sub-menu, i.e, depressing a “1” chooses an information type of stocks, while depressing a “2” chooses an information type of sports. For an information type of stocks, messaging platform 204 also prompts subscriber 205 to enter a stock symbol using the telephone keypad in the manner outlined in the multimedia messaging invention, which is incorporated herein by reference.
Besides providing an information type 209 selection, subscriber 205 is also prompted for a delivery period 210, and delivery format 211 which are entered using the telephone keypad. In accordance with a present embodiment of the present invention, delivery format 211 includes an email, fax, or voice format.
At step 206c, after step 206b is complete, messaging platform 204 contacts its assigned master platform such as master platform 184 by sending a SUBSCRIBE request to master platform 184. In response, master platform 184 requests service from information source 200 by providing service information 208 received from subscriber 205. In addition, master platform 184 creates a storage location that corresponds to subscriber 205 in a memory store 186 for holding any information received from information source 200 that matches service information 208 entered by subscriber 205 in step 206b. 
The SUBSCRIBE request includes a command type, a node ID corresponding to messaging platform 204, a mailbox ID corresponding to subscriber 205, and a password (if applicable). For example, the subscribe request may include a command type that instructs master platform 184 to request that information source 200 provide the information sought in service information 208 that was chosen by subscriber 205 in step 206b. 
At step 206d, if service information 208 includes an email delivery format 211, step 206e is performed. Otherwise step 206f is performed. At step 206e, messaging platform converts any information received from information source 200 that corresponds to service information 208 entered by subscriber 205 into a message having an email format and delivers the message to mailbox 204 which corresponds to subscriber 205.
At step 206f, if subscribing messaging platform 204 has an in-operation status, such as when it has a viable connection to the switched backbone 176, step 206g is performed. At step 206g, any information received from source 200 that corresponds to the subscription information requested is forwarded to messaging platform 204 by master platform 184.
If at step 206f, subscribing messaging platform 204 has a non-operational status, step 206h is performed. Through a microprocessor system running under program control or equivalent device master platform performs the following steps. At step 206h, master platform stores any information received from source 200 in memory store 186. Master platform 184 does not send the stored information to a corresponding subscriber's messaging platform 204 until master platform 184 determines that messaging platform 204 has an in-operation status. For example, master platform 184 may refer to its master global routing table to find a messaging platform entry that defines the profile for messaging platform 204 to determine whether messaging platform 204 has an in-operation status based on the operation schedule listed in messaging platform entry.
In an alternative embodiment, the present invention may use a master platform 212 dedicated solely for the handling messages originating from information sources outside the messaging network such as from information source 214. Master platform 212 may be configured to receive information through any of its network interfaces such as through its switched backbone interface 176 or through an interface supporting a dedicated connection to information source 214.
At step 206i, the information received by master platform 184 is received by messaging platform 204 which converts the information to have delivery format 210 prior to delivery.
At step 206j, messaging platform 204 delivers the information to mailbox 202, which corresponds to subscriber 205, using delivery format 210.
While illustrative embodiments and applications of this invention have been shown and described, it would be apparent to those skilled in the art that many more modifications than have been mentioned above are possible without departing from the inventive concepts set forth herein. The invention, therefore, is not to be limited except in the spirit of the appended claims.

## Claims

1. A method for providing information to a subscriber on a messaging system, the method comprising the steps of:
providing a mailbox ID and service information to a messaging platform, said mailbox ID corresponding to a subscriber serviced by said messaging platform and said service information including an information type, a delivery period, and a delivery format;
sending a request to a master platform in response to said service information, said master platform responding to said request by requesting information from an information source, said information corresponding to said service information;
sending information received from said information source to said messaging platform;
converting information received from said information source into a delivery format corresponding to said delivery format selected in said step of providing service information; and
providing said information to a subscriber when said subscriber accesses a mailbox corresponding to said mailbox ID.

2. The method in claim 1, further including the step of maintaining a master profile table, said master profile table having a messaging platform profile for each messaging platform established on the messaging network, said messaging platform profile including a host ID, an area of operation, an operation schedule, and a token pool.

3. The method in claim 1, wherein said delivery format includes a fax delivery format.

4. The method in claim 1, wherein said delivery format includes a voice delivery format.

5. The method in claim 1, wherein said delivery format includes an email format.

6. The method of claim 1, wherein said master platform forwards said information received from said information source to said messaging platform only when said messaging platform has an in-operation status.

7. The method of claim 6, where said in-operation status is at least partly based on said operation schedule defined for said messaging platform.

8. The method of claim 1, wherein said master platform delays sending said information received from said information source to said messaging platform when said messaging platform has a non-operational status.

9. The method of claim 8, wherein said non-operational status is obtained when said token pool falls below a selected threshold.

10. The method of claim 1, where said master platform converts said information received from said information source into an email format and sends said email formatted information to a mailbox supported by a messaging platform that corresponds to said mailbox ID, if an email format has been chosen as said delivery format.

11. A system for delivering information to a subscriber on a messaging system, the system comprising:
a messaging platform having means for receiving a mailbox ID and service information from a subscriber and means for requesting from a master platform information corresponding to said service information, said master platform having means for communicating with an information source, said means for communicating responsive to said means for requesting by requesting information corresponding to said service information from said information source;
wherein said master platform is configured to respond to any information received from said information source by sending said information to said messaging platform; and
wherein said messaging platform is configured to covert said information to have a delivery format corresponding to a delivery format selected by said subscriber, said messaging platform having means for providing said information in said delivery format to said subscriber when said subscriber accesses a mailbox corresponding to said mailbox ID.

12. The system in claim 11, wherein said service information includes an information type, a delivery period, and a delivery format.

13. The system in claim 11, wherein said delivery format includes a voice delivery format.

14. The system in claim 11, wherein said delivery format includes an email format.

15. The system in claim 11, wherein said delivery format includes a fax format.

16. A messaging network, comprising:
a plurality of messaging platforms coupled to a communication network, each of the plurality of messaging platforms communicating with the others of the plurality of messaging platforms via the communication network;
a user messaging device coupled to a first of the plurality of messaging platforms, the user messaging device being configured to transmit a mailbox ID and service information to the first of the plurality of messaging platforms wherein the first of the plurality of messaging platforms is configured to receive the mailbox ID and service information and to generate a request message in response thereto;
a master platform coupled to the communication network and configured to receive the request message from the first of the plurality of messaging platforms, the request message including a request for information corresponding to the service information; and
an information source external to the communication network coupled to the master platform and configured to receive the request for information corresponding to the service information and to respond to the request with a response message, the master platform further configured to receive the response message and to transmit the response message to the first of the plurality of messaging platforms.

17. The network of claim 16 wherein the first of the plurality of messaging platforms is further configured to process the information in the information source response message to have a delivery format corresponding to a delivery format selected by a subscriber.

18. The network of claim 17 wherein the first of the plurality of messaging platforms is further configured to respond to subscriber access of a mailbox corresponding to the mailbox ID by providing the information in the information source response message to the subscriber in the selected delivery format.

19. The system in claim 18 wherein the delivery format comprises a selected one of a voice delivery format, an email format, and a facsimile format.

20. The system of claim 16 wherein the information in the information source response message delivered to the subscriber is multimedia information.

21. The system in claim 16 wherein said service information includes an information type, a delivery period, and a delivery format.

22. The system of claim 16 wherein the master platform is further configured to forward the information in the information source response message to the first of the plurality of messaging platforms only when the first of the plurality of messaging platforms has an in-operation status.

23. The system of claim 16 wherein the master platform is further configured to delay sending the information in the information source response message to the first of the plurality of messaging platforms when the first of the plurality of messaging platforms has a non-operational status.

24. A system for delivering information to a subscriber on a messaging system, the system comprising:
a master messaging computer having a communication module;
a messaging computer having a communication module configured to receive a mailbox ID and service information from a subscriber and to communicate with the master messaging computer communication module to request from the master messaging computer information corresponding to the service information;
the master messaging computer communication module being further configured to communicate with an information source in response to the master messaging computer communication module receiving the request for information corresponding to the service information from the messaging computer communication module, the communication from the master messaging computer communication module to the information source comprising a request for information corresponding to the service information;
wherein the master messaging computer is further configured to respond to any information received from the information source by sending the information to the messaging computer;
wherein the messaging computer is further configured to convert the information to have a delivery format corresponding to a delivery format selected by the subscriber; and
wherein the messaging computer communication module is further configured to provide the information in the delivery format to the subscriber when the subscriber accesses a mailbox corresponding to the mailbox ID.

25. The system of claim 24, wherein said master messaging computer forwards said information received from said information source to said messaging computer only when said messaging computer has an in-operation status.

26. The system of claim 25, wherein said in-operation status is based on said operation schedule defined for said messaging computer.

27. The system of claim 24, wherein said master messaging computer is configured to delay sending said information received from said information source to said messaging computer when said messaging computer has a non-operational status.

28. The system of claim 27, wherein said non-operational status is obtained when said token pool falls below a selected threshold.

29. The system of claim 24, wherein said master messaging computer is configured to convert said information received from said information source into an email format and sends said email formatted information to a mailbox supported by a messaging computer that corresponds to said mailbox ID, if an email format has been chosen as said delivery format.